Explosive-engine.



Attorneys P. J. QROUGH L H, STUTSMAN. BXPLOSIVB ENGINE.

APPLICATION FILED JULY 14, 191s,

Witnesses Inventor.,

P. J. GROUCH & H. STUTSMAN. EXPLOSIVVB ENGINE. APPLICATION FILED JULY 14, 1913.

1,093,317. Patented Apr14,1914

` www@ @a M@ Witn-esses Inventors FRANK J. CRO'UCH- AND HENRY STUTSMAN, 'OF PORTLAND, OREGGN'.

EXPLOSIVE-ENG-INE.

Specication of Letters Patent.

Patented npr. let, wild.

Application led July 14, 1913. Sei-iai No. 779,047.

To all whom it may concern Be it known that we, FRANK J. CRoUoH and HENRY STUTSMAN, citizens ofthe United States, residingfat Portland, in the county of Multnomah, Stat-e of Gregori, have invented a new and useful Explosive-Engine, of which the following is a specification.

The present invention relates to improve ments in explosive engines, one obj ect of the invention being the provision of a slidably mounted air-cushioned device mounted in the head of the engine and disposed for limited movement, due to the action of the power piston and explosion, whereby a resiliently cushioned compression chamber is provided, due to the coaction of compressed air with the present device and the compression of the explosion charge, and whereby at the proper time a certain amount -of 'the compressed air is admitted to assist in scavenging the engine.

A still further object of the present invention, is the provision of a slidable double diamctered piston disposed in the head of the explosion engine, the same being normally held toward the power piston by air ressure, which air pressure acts upon the double diametened piston or plunger to cushion the same to produce a resilient cushion action during the compression stroke of the power piston, there being disposed in the plunger a valve controlled port, y'vhich is released at the proper time to admit the compressed air into the explosion chamber to properly scavenge the same.

With the foregoing and other objects in view which will appear as the description roceeds, the invention resides in the com- Eination and arrangement of parts and in the details bof construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made with- ,in the scope of what is claimed without departing from the spirit of the invention.

In the drawings-Figure 1 is a detail sectional view through a single cylinder engine embodying the present invention, the parts being in the position they assume at the end of the exhaust and scavenging stroke of the engine. Fig. 2V is a view showing the upper end ofthe cylinder and head in transverse cross section, with the power piston and compressed air piston in the positions they assume at the end of the compression stroke. Fig. 3 is a section taken on line ingz downwardly.

3*?) of l'looking upwardly. et .te a section taken on line 3-3 of Fig. 1 lcoii- .eferring to the drawings, the numeral 1 designates the cylinder of theengine which 1s Jacketed as usual, and is provided with the manifold connecting portion E?, both for the intake and exhaust of the engine. casing 3 constitutes the head of the engine and also the cap portion a of the valve cas ing of the engine, there being led into the upper chambered portion of the cap 3, a pipe 4 which supplies compressed air from any compression means (not shown) into the upper end of the cap 3. Die' ed in the conduit 4 `is a check valve 6, w cn, mits the proper introduction of tt; mb pressed ai-r into the chamber S above the cushioning plunger 9, but prevents the haelt pressure due to the compression stroke of the power piston 21 from forcing' the air back into the pipe. This piston 9 is a dou-- ble diametcred piston, being provided with the enlarved diametered portion 11 for movement 'within the chamber 8, and with thereduced diametered portion 10 for movement within the ring member 7,` which ,is insertible into the lower screw threaded portion of the cap 3. The enlarged diametered portionof the member 9 is provided with packing rings a andsaid plunger 9 is held against rotary movement by means, of

the guidin` pin 12 'carried by the casing 3 and slidab e through the member 9..

Elfi

A disk valve 13 which is provided with oppositely disposed seating portions has its stem-14 mounted for siidmg movement in the concentric bore 15 .of the member 9, said stem being of such a size as to, 'when the valve is seated upon'its lower seat 16, be

rojected below the lower end of the reuced diametered portion of the member 9, the purpose of which will presently appear. A detachable valve seat carrying ring 17 is insertible into the member 9 in the upper endithereof and t us constitutes a seat for closin'g the upper e d of the port 18 when the valve 13 is in itsguppermost position, said port being close by the coaction of the seat 16 when the va ve is in its lowdrmost position, as shownin" Fig. Q. )By this means communication between the up per end of the chamber 8 above the piston or member 9 is controlled entirely by means of the operation of the valve 13, the 4air being held in the compressed state therein when lio .miki

the parts are in the position they assume at the lnginning of the compression stroke up ifo the end of such stroke, as shown 1n Fig.

:L the. air pressure above holding the valve lseated.

The ring 7, as clearly shown 1n Figs. 1, 2

' engine. The powerpiston 21 is mounted as usual upon a rod 22 which is connected to the crank shaft 23, the various partsof the engine otherwise than the member 9 and its necessary connections and fittings being inw; dirative of any form of explosive engine.

f; m wir iiir may be supplied to the upper end of the chamber 8 by anywell known means, as .for instance an air compressor operably connected. to the Vcrank shaft 23 or where the engine is a four cylinde'rengine, a fifth cyl- 'luder may be provided and operably connected to supply compressedair through all of the conduits 4 to the'various chambers 8 of the different power cylinders. It is ves sential, however, that a constant pressure be provided, .so that the Same-:amount of air w-il be received into the upper end of the chamber 8 to normally propel the member Il to its lowermost position, or as shown in u 1. The valve 13 when under the innce only of the compressed air assumes ie closed position, as shown in Fig. 2-with lower end of the stem 15 projected be'- 'iow the lower face of the member 9. The valve 13 assumes the position, as shown in l; ig. 1 upon the extreme upward movement 1"" the piston 21 when exhausting the burnt uges that is at the end of the exhaust oke, the air being admitted from the upend oi' the chamber 8 through the port M due to the mechanical opening of the `wilve 153, when its stein 15 is engaged by the rrressed portion 24 of the power piston 21. "l li' action permits the introduction of a st of air through the port 18 into the L mbered 'portion lof4 the ring 7 and trans- .'crsely across th head of the piston 21 in the space between the upper end thereof :fr the lower end of the plunger 9, the burnt and the fresh air being expelled from the engine into the chamber 20 controlled by the exhaust valve By this means the coini'ilete discharge of the burnt gases is as sured, the. engine being completely scavenged at the end of the exhaust stroke.

From the foregoing description, taken in connection with the drawings, the operation of the present explosive engine is readily understood. but briefly stated itis as follows:

w 1th. the piston 21 is its full up-stroke posi-- tion and just after the mechanical opening of the valve 13 as viewed in Fig. 1, the valve 13 is closed due to the pressure of thefair thereabove in the 'chamber 8,'such air pressure. also forcing the plunger-9 toits lowermostl position. ,'lhefinstroke bof the ,power piston draws into the cylinder the explosive charge, the intake valve being operated at the proper time to admit the same, and as the power piston 21 moves upwardly to assume the position as shown in Fig. 2, the compressed charge being interposed between the upper end of the power piston 21- and 26 and the power piston 21 is propelled downwardly, the plunger 9 being further moved upwardly due tor` theforce ,exerted by the explosionv but moving downwardly to -its lowermost position, as soon as the piston 21 is in its lowest position, the momentum imparted by the explosion moving the piston upwardlyl vAs theair pressure in the upper end of the chamber 8 has disposed the valve 13 sp that the lower end thereof is projected below the lower end; ofthe plunger 9, the recess 24: of the power piston 21 will engage thesame and move from its lower seated position tothe. position as shown in Fig. 1, and consequently permit the` compressed air in the chamber 8 to flow through the port 18 and the recess 7 transversely across the heads of the pistons 21 and 9 to'be exhausted throughthe` port controlled by the exhaust valve 25. The main portion of the burnt gases have, however, been expelled during the upward stroke of the piston 21, so that at the time the compressed air is admitted, a small amount of discharge is left and is entirely expelled and the cylinder scavenged kdue to the release of the oompressedair as before described. As soon as the piston starts downwardly, the valve 13 is seated by the compressed air pressure from above, and thecycles of operation follow as before described.

what is ahmed is:

1. An explosion engine, including a cylinder, a head therefor, a power piston mounted therein, a plunger mounted in the head of 'the cylinder, means for supplying compressed air to the cylinder head in the rear of the plunger, whereby the plunger is held toward the power piston, said plunger being elastically cushioned by the -compressed air but yielding to move away from the power piston at the compression and explosion strokes thereof, said plunger being provided with a port disposed to communicate at the insy 1,oes,3 17

rear thereof and into the upper end of the cylinder, and e valve mounted in the pll'inger for eontrollingthe port? said valve being operated by the power p1ston at the end of the exhaust stroke to admit the compressed ziir to scavenge the cylinder.

2. An explosion engine, including a eylinder, e `power piston mounted therein, an elongated-oep torining` the heed` of the cylinder, :L ring mounted inf the end of the cap und providing en enlarged chamber at the.

upper end of the cap, :i double diametered plunger having a port therethrough and mountedin the cap with the reduced portion mounted in the ring, lneunsrfor supplying compressed air at the rearof the enlarged end of the plunger to elastica-Hy cushion the plunger during the compression and explosion strokes, and a valve in the plunger forv controlling the port and communicationbetween the enlarged chamber of the oep and lthe cylinder, said Valve being operated loy the power pistonl to admit a' scavenging charge of air at the end of the exhaust stroke of the power piston.

In testimony that We claim the foregoing as our ownnve have lhereto ailixed our signatures in the presence of two Witnesses.

FRANK J. CROUCH. HENRY STUTSMAN.

Witnesses:

D. C. SoU'rHWoR'rH, A. W. HAGER. 

